Samurai Jack

At first, you will see Aku's head pop up from the fire. He will even
laser beam you with his eyes and/or shoot you. Run around and avoid
the laser beams and the shots. He will then try to beam you with his
hand. Jump up and hit him. He wil then transform. In his 1st form,
he is a bull. You can only hit him if he reaches the other end and
stops. Once again, he will try to laser beam or shoot you. Avoid
getting hit. H will then try to beam you with his hand again. Jump
up and hit him. In his 2nd form, he is a bird. You can hit him
when he stops at a corner or if he flies down. Once again, Aku will
try to laser beam or shoot you. Avoid getting hit. Aku will then try
to beam you with his hand again. Just jump up and hit him. In his
3rd and final form, he is a dragon. You can only hit him when he
stops firing at you. If he crouches down and fires at you, you can
block it with your shield. However, if he is up in the air, you must
jump or get away as far as possible. When Aku is up in the air
firing, you cannot block the fire with you shield. After that he is
defeated.